A liquid-cooled cabinet temperature control method and system fusing multi-parameter perception and remote internet of things

Abstract

The present application relates to liquid cooling temperature control technical field, especially to the liquid cooling cabinet temperature control method and system of fusion multi-parameter perception and remote internet of things, method is applied to liquid cooling cabinet;The controller controls the stable operation of the electronic circulating pump at multiple speed gears, and collects the pump pressure and liquid injection flow corresponding to each speed gear, establishes the normal corresponding relationship data table between the electronic circulating pump speed, pump pressure and liquid injection flow;During the operation of the liquid cooling cabinet, the controller reads the liquid level, current speed, current pump pressure, current liquid injection flow, etc., calls the corresponding pump pressure allowable range and liquid injection flow allowable range when the liquid level is in the allowable operation liquid level, and judges the liquid injection effectiveness and abnormal type based on the matching relationship of pressure and flow. The present application executes pulse flushing, low-speed exhaust, segmented speed verification or standby electronic circulating pump switching processing based on the abnormal type, and uploads operation data and abnormal processing data through the remote internet of things communication component.

Description

Technical Field

[0001] This invention relates to the field of liquid cooling temperature control technology, and in particular to a liquid cooling cabinet temperature control method and system that integrates multi-parameter sensing and remote IoT. Background Technology

[0002] With the development of edge computing, artificial intelligence computing, and high-density servers, the heat flux density of heat-generating components such as CPUs, GPUs, power modules, and storage modules inside servers continues to increase. For scenarios such as building floor node server rooms, small data centers, and edge computer rooms, traditional air conditioners or ordinary rack fans are insufficient to meet the continuous and stable heat dissipation requirements of servers due to factors such as limited outdoor unit installation locations, discontinuous property cooling time, high noise levels from traditional air-cooled equipment, and difficulty in handling localized hot spots.

[0003] Immersion liquid coolers improve heat exchange efficiency and reduce reliance on cryogenic cooling sources by at least partially immersing the server in an insulating coolant, allowing direct heat exchange between the server's heat-generating components and the coolant. Existing liquid coolers typically include a coolant tank, an electronic circulation pump, a dry cooler, a fan, temperature sensors, level sensors, pressure sensors, flow sensors, and a controller. The controller generally controls the operation of the electronic circulation pump and fan based on the coolant temperature or return temperature.

[0004] However, in actual operation of a liquid coolant cooler, a normal coolant level in the reservoir does not necessarily mean that the spray nozzles are supplying coolant effectively. Specifically, residual gas at the inlet of the electronic circulation pump, performance degradation of the electronic circulation pump, partial blockage in the supply line, partial blockage in the spray line, impurities adhering to the spray nozzles, increased internal resistance of the dry cooler, or residual air bubbles in the lines can all lead to insufficient coolant flow from the spray nozzles. In this case, the coolant level sensor in the reservoir may still show a normal level, and the return temperature may not have risen significantly.

[0005] If the controller adjusts the fan or increases the speed of the electronic circulation pump only after the return liquid temperature rises, it is a passive control after the temperature is abnormal. The above method is prone to the following problems: (1) It is only identified after the local hot spot of the server has formed, resulting in a delayed response; (2) The controller may mistakenly believe that the heat dissipation capacity is insufficient and simply increase the fan speed, which cannot solve the problem of insufficient effective liquid supply at the spray nozzle; (3) If there is air resistance at the inlet of the electronic circulation pump or the performance of the electronic circulation pump is degraded, blindly increasing the speed of the electronic circulation pump may exacerbate the flow fluctuation; (4) In unattended or poorly attended scenarios, it is impossible to determine in time whether the abnormality occurs in the spray channel, the inlet of the electronic circulation pump, or the heat exchange capacity on the cooling side.

[0006] Therefore, this application proposes a technical solution: a liquid cooler temperature control method that integrates multi-parameter sensing and remote IoT to solve the above problems. Summary of the Invention

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution; In a first aspect, the present invention provides a temperature control method for a liquid cooler that integrates multi-parameter sensing and remote IoT, applied to a liquid cooler, wherein the liquid cooler includes a coolant tank, an electronic circulation pump, a liquid spraying pipeline, a pump post-pressure sensor, a liquid spraying flow sensor, a liquid level sensor, a supply liquid temperature sensor, a return liquid temperature sensor, a controller, and a remote IoT communication component; the method includes: S1. After the liquid cooler is installed and filled, control the electronic circulation pump to run stably at multiple speed levels, and collect the pump post-pump pressure and liquid flow rate corresponding to each speed level to form a normal correspondence data table between the electronic circulation pump speed level, electronic circulation pump speed, pump post-pump pressure and liquid flow rate. The normal correspondence data table is used to determine the corresponding allowable range of pump post-pump pressure and allowable range of liquid flow rate.

[0008] S2. During the operation of the liquid cooler, read the coolant level, current electronic circulation pump speed, current pump pressure, current injection flow rate, supply temperature, and return temperature; first, perform a pre-judgment based on the coolant level, and when the coolant level is at the allowable operating level, retrieve the corresponding allowable range of pump pressure and allowable range of injection flow rate from the normal correspondence data table based on the current electronic circulation pump speed.

[0009] S3. Based on the matching relationship between the current pump post-pressure, the current injection flow rate and the corresponding allowable range of pump post-pressure and allowable range of injection flow rate, determine the injection effectiveness and abnormality type, and determine whether the injection effectiveness is normal, the injection pipeline resistance is abnormal, the electronic circulation pump's liquid supply capacity is abnormal, or an intermediate state that requires speed verification.

[0010] S4. Execute the corresponding exception handling process based on the determined exception type. The exception handling process includes at least one of the following: pulse flushing process, low-speed exhaust process, segmented speed-up verification process, and backup electronic circulation pump switching process.

[0011] S5. Based on the normal correspondence data table, current operating parameters, spray effectiveness status, anomaly type, and execution results of the anomaly handling process, upload the liquid cooler operating data and anomaly handling data through the remote IoT communication component; and perform permission legality verification and equipment security scope verification when receiving remote control commands, and continue to execute local operating parameter acquisition, spray effectiveness judgment, anomaly handling, and post-processing review when communication is interrupted.

[0012] Furthermore, the coolant tank is used to contain insulating coolant, and the electronic circulation pump is used to drive the insulating coolant to circulate; the liquid cooling cabinet also includes a server, a cooling regulation component, coolant piping, a spray effectiveness detection component, and a control component; The control component is used to perform parameter acquisition, data table creation, anomaly judgment and anomaly handling, and the control component includes the controller and the data storage unit, the data storage unit is used to store the normal correspondence data table; The coolant piping includes a return line, a supply line, and a spray line; the cooling regulation components include a dry cooler, a fan, and a regulating valve; the spray effectiveness detection components include a pump pressure sensor, a spray flow sensor, a level sensor, a supply temperature sensor, and a return temperature sensor; and the control components include a controller and a data storage unit.

[0013] Secondly, a liquid cooler temperature control system integrating multi-parameter sensing and remote IoT is provided. The system is used to execute the liquid cooler temperature control method integrating multi-parameter sensing and remote IoT described in Embodiment 1. The system includes a coolant tank, insulating coolant, electronic circulating pump, dry cooler, fan, regulating valve, return pipeline, supply pipeline, spray pipeline, pump pressure sensor, spray flow sensor, liquid level sensor, supply temperature sensor, return temperature sensor, controller, data storage unit, and remote IoT communication components. The coolant tank is used to hold insulating coolant, and the server is at least partially immersed in the insulating coolant. The coolant tank is equipped with a return port and a spray port. The electronic circulation pump is used to drive the insulating coolant to circulate, so that the insulating coolant passes through the return line, the electronic circulation pump, the dry cooler, the supply line and the spray line in sequence, and is sprayed out from the spray nozzle. Dry coolers are used to dissipate heat from the circulating insulating coolant, fans are used to enhance the heat dissipation capacity of dry coolers, and regulating valves are used to regulate the flow rate or opening status of the coolant in the circulation path. The downstream pressure sensor is located downstream of the electronic circulating pump and is used to detect the downstream pressure formed by the electronic circulating pump at the current speed. The liquid flow sensor is used to detect the liquid flow rate in the liquid spraying pipeline; The level sensor is used to detect the level of insulating coolant in the coolant tank; The supply temperature sensor is used to detect the temperature of the insulating coolant before it enters the injection pipeline; The return temperature sensor is used to detect the temperature of the insulating coolant after it has absorbed heat from the server. The controller is connected to the electronic circulating pump, fan, regulating valve, pump post-pressure sensor, spray flow sensor, liquid level sensor, supply liquid temperature sensor, return liquid temperature sensor, data storage unit, and remote IoT communication component. The data storage unit is used to store the normal correspondence data table, current operating parameters, spray effectiveness status, abnormality type, abnormality handling actions, and post-processing review results. The remote IoT communication component is used to upload the normal correspondence data table, current operating parameters, spray effectiveness status, abnormality type, abnormality handling action, post-handling verification result and alarm information to the remote platform; The controller is used to establish a normal correspondence data table between the electronic circulation pump speed setting, electronic circulation pump speed, pump post-pressure and liquid flow rate. Based on the matching relationship between the current electronic circulation pump speed, current pump post-pressure and current liquid flow rate and the normal correspondence data table, it determines the effectiveness of liquid spraying and the type of abnormality, executes the corresponding abnormality handling process and performs post-processing review.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention establishes a normal correspondence between the electronic circulation pump speed, the pump post-pressure, and the spray flow rate under the stable flow state after the liquid cooler is installed and filled. During operation, it combines liquid level pre-judgment, pressure / flow matching judgment, and supply and return liquid temperature trend verification to achieve active identification of spray effectiveness. When the spray flow rate is insufficient, the controller can distinguish abnormal spray pipeline resistance, abnormal electronic circulation pump supply capacity, or short-term flow fluctuation based on the deviation combination of pump post-pressure and spray flow rate. It then executes processing procedures such as pulse flushing, low-speed exhaust, segmented speed-up verification, or backup pump switching, thereby avoiding reliance solely on the hysteresis control after the return liquid temperature rises, reducing the risk of local hot spots on the server, and improving the operational safety, anomaly self-recovery capability, and remote operation and maintenance closed-loop capability of the liquid cooler in unattended scenarios. Attached Figure Description

[0015] Fig. 1 This is a flowchart of a liquid cooler temperature control method that integrates multi-parameter sensing and remote IoT.

[0016] Fig. 2 This is an architecture diagram of a liquid cooler temperature control system that integrates multi-parameter sensing and remote IoT.

[0017] Fig. 3 This is a schematic diagram illustrating the effectiveness of liquid spraying and the determination of abnormal types in a liquid-cooled cabinet temperature control method that integrates multi-parameter sensing and remote IoT.

[0018] The components include: liquid cooler 1, coolant tank 11, return port 111, spray port 112, insulating coolant 2, server 3, electronic circulation pump 4, first electronic circulation pump 41, second electronic circulation pump 42, cooling adjustment component 5, dry cooler 51, fan 52, regulating valve 53, coolant pipeline 6, return pipeline 61, supply pipeline 62, spray pipeline 63, spray effectiveness detection component 7, pump post-pressure sensor 71, spray flow sensor 72, liquid level sensor 73, supply temperature sensor 74, return temperature sensor 75, control component 8, controller 81, data storage unit 84, and remote IoT communication component 9. Detailed Implementation

[0019] The specific embodiments of the present invention will now be described with reference to the accompanying drawings. These embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0020] The core of this invention does not lie in individually collecting parameters such as pump post-pressure, spray flow rate, or temperature, but rather in: first, establishing a normal correspondence between the electronic circulation pump speed, pump post-pressure, and spray flow rate under stable flow conditions after the liquid cooler is installed and filled; then, during operation, comparing the actual pump post-pressure and spray flow rate detected at the current electronic circulation pump speed with the established normal correspondence; finally, judging the spray effectiveness and anomaly type based on the deviation combinations of pressure and flow rate relative to the normal relationship at the same speed setting. After completing the spray effectiveness judgment and anomaly handling, the controller performs temperature control adjustment of the electronic circulation pump, fan, and regulating valve in conjunction with the supply and return liquid temperatures.

[0021] In this way, even if the coolant level is at the allowable operating level and the return temperature has not reached the alarm threshold, as long as the pump pressure and injection flow rate have deviated from the normal relationship corresponding to the current electronic circulation pump speed, the controller can still enter the injection effectiveness judgment and abnormal handling process.

[0022] Example 1 like Figs. 1-3 As shown, this embodiment provides a liquid cooler temperature control method that integrates multi-parameter sensing and remote IoT, applied to a liquid cooler 1. The liquid cooler 1 includes a coolant tank 11, an electronic circulation pump 4, a liquid spraying pipeline 63, a pump post-pressure sensor 71, a liquid spraying flow sensor 72, a liquid level sensor 73, a liquid supply temperature sensor 74, a liquid return temperature sensor 75, a controller 81, and a remote IoT communication component 9. Furthermore, the coolant tank 11 is used to contain the insulating coolant 2, and the electronic circulation pump 4 is used to drive the insulating coolant 2 to circulate; the liquid cooling cabinet 1 also includes a server 3, a cooling regulation component 5, a coolant pipeline 6, a spray effectiveness detection component 7, a control component 8, and a data storage unit 84; the coolant pipeline 6 includes a return pipeline 61, a supply pipeline 62, and a spray pipeline 63; the cooling regulation component 5 includes a dry cooler 51, a fan 52, and a regulating valve 53; the spray effectiveness detection component 7 includes a pump pressure sensor 71, a spray flow sensor 72, a liquid level sensor 73, a supply temperature sensor 74, and a return temperature sensor 75; the control component 8 includes a controller 81 and a data storage unit 84; The method specifically includes the following steps.

[0023] S1. After the liquid cooler 1 is installed and filled with liquid, the controller 81 controls the electronic circulation pump 4 to run stably at multiple speed levels, and collects the pump post pressure and liquid flow rate corresponding to each speed level to form a normal correspondence data table between the speed level of the electronic circulation pump 4, the actual speed of the electronic circulation pump 4, the pump post pressure and the liquid flow rate. Specifically, the liquid cooler 1 is first installed, and then insulating coolant 2 is added to the coolant tank 11 until the level detected by the level sensor 73 reaches the allowable operating level. The controller 81 starts the electronic circulation pump 4 at low speed, so that the insulating coolant 2 sequentially fills the return line 61, the electronic circulation pump 4, the dry cooler 51, the supply line 62, and the spray line 63. During the low-speed start-up, some of the gas remaining in the coolant line 6 or the pump chamber of the electronic circulation pump 4 during the initial filling process is discharged to avoid drastic fluctuations in the spray flow rate caused by direct high-speed start-up.

[0024] Once the liquid output from the nozzle 112 is stable, and the fluctuation amplitudes of the post-pump pressure detected by the post-pump pressure sensor 71 and the spray flow rate detected by the spray flow sensor 72 are both less than the preset fluctuation threshold within a preset stabilization time, the controller 81 controls the electronic circulation pump 4 to operate sequentially at multiple speed levels.

[0025] The preset stabilization time is used to determine whether the injection port 112, the pump pressure, and the injection flow rate have transitioned from the initial filling state to a stable flow state.

[0026] As an optional implementation, the preset stabilization time is set to 30s-180s; for liquid coolers 1 with shorter pipeline length and lower viscosity of insulating coolant 2, the preset stabilization time can be 30s-60s; for liquid coolers 1 with longer pipeline length, more spray branches, or higher viscosity of insulating coolant 2, the preset stabilization time can be 90s-180s.

[0027] The preset fluctuation threshold is used to eliminate instantaneous fluctuations during initial filling, local bubble discharge, or speed adjustment of the electronic circulation pump 4.

[0028] As an optional implementation, the fluctuation range of the pump downstream pressure is set to not exceed 3% to 8% of the average pump downstream pressure within a preset stabilization time, and the fluctuation range of the injection flow rate is set to not exceed 3% to 10% of the average injection flow rate within a preset stabilization time; or an absolute fluctuation threshold is set based on the detection accuracy of the pump downstream pressure sensor 71 and the injection flow rate sensor 72. That is, only when both the pump downstream pressure and the injection flow rate meet the corresponding fluctuation conditions will the controller 81 consider that the operating state at the current speed setting meets the conditions for establishing reference data.

[0029] The multiple speed ranges include low speed, medium speed and high speed, or can be divided into more ranges based on the rated speed range of the electronic circulation pump 4, the length of the coolant pipeline 6, the heat dissipation power of the server 3 and the viscosity of the insulating coolant 2.

[0030] For example, when the rated speed range of the electronic circulating pump 4 is 1000r / min-5000r / min, 1000r / min-1800r / min can be set as the low-speed calibration range, 1800r / min-3200r / min as the medium-speed calibration range, and 3200r / min-4500r / min as the high-speed calibration range. Within each calibration range, one or more speed gears can be selected to establish corresponding pump post-pressure reference values ​​and injection flow reference values.

[0031] For liquid cooler 1 with a coolant pipeline 6 longer than the preset length, a large number of spray nozzles 112, or a high heat dissipation power of server 3, calibration gears can be added in the medium-to-high speed range to improve the accuracy of the normal correspondence data table in covering the actual operating conditions. For liquid cooler 1 with a high viscosity of insulating coolant 2, the interval between adjacent speed gears can be appropriately reduced to avoid large deviations in the correspondence between pump pressure and spray flow rate due to viscosity changes.

[0032] It should be noted that the above speed values ​​are only used to illustrate the gear division method and do not constitute a limitation on the specific model and rated speed range of the electronic circulating pump 4. In practical applications, the controller 81 can automatically generate or correct the speed gear based on the rated speed of the electronic circulating pump 4, the resistance characteristics of the coolant pipeline 6, and the heat dissipation requirements of the server 3.

[0033] Furthermore, at each speed setting, the controller 81 maintains the electronic circulating pump 4 in stable operation for a preset sampling time, and reads the pump post-pressure and injection flow rate multiple times within the corresponding preset sampling time. The controller 81 removes abrupt changes and performs averaging or moving average processing on the collected pump post-pressure and injection flow rate values, using the stabilized pump post-pressure and injection flow rate values ​​as the reference data for the corresponding speed setting, i.e., the pump post-pressure reference value and injection flow rate reference value. Then, based on a preset deviation coefficient, the controller 81 forms the pump post-pressure allowable range and injection flow rate allowable range based on the pump post-pressure reference value and injection flow rate reference value, and finally constructs a normal correspondence data table based on the speed setting of the electronic circulating pump 4, the actual speed of the electronic circulating pump 4, the pump post-pressure reference value, the pump post-pressure allowable range, the injection flow rate reference value, and the injection flow rate allowable range.

[0034] Preferably, at each speed setting, the controller 81 continuously collects multiple sets of post-pump pressure and injection flow rate values ​​according to a preset sampling period. For the collected data, the controller 81 first determines the variation range between adjacent sampled values, or determines the deviation of a single sampled value from the median value of the sampling data at that speed setting; when the deviation of a sampled value from adjacent sampled values ​​or the median value is greater than a preset mutation threshold, the controller 81 discards the corresponding sampled value as a mutation value. The mutation value usually corresponds to the passage of air bubbles, instantaneous interference of the sensor, or short-term speed fluctuations of the electronic circulation pump 4, and is not used as the basis for establishing reference data.

[0035] Then, after removing abrupt changes, the controller 81 performs an arithmetic average of the remaining post-pump pressure and injection flow rates to obtain the baseline values ​​for the post-pump pressure and injection flow rates at the corresponding speed settings. Alternatively, the controller 81 uses a moving average method, treating multiple consecutive sampled values ​​as a calculation window, updating the data within the window as the sampling time progresses, and using the stable value of the calculation results from multiple windows as the baseline data for the corresponding speed settings. In other words, through the above processing, the impact of single-point interference on the normal correspondence data table can be reduced, making subsequent injection effectiveness judgments more stable.

[0036] Furthermore, after obtaining the reference values ​​for the pump post-pressure and injection flow rate, the controller 81 sets preset deviation coefficients for the pump post-pressure and injection flow rate, respectively. Let the reference value for the pump post-pressure at a certain speed be P0, the reference value for the injection flow rate be Q0, the deviation coefficient for the pump post-pressure be α, and the deviation coefficient for the injection flow rate be β. Then, the corresponding allowable range for the pump post-pressure is set to P0×(1-α) to P0×(1+α), and the allowable range for the injection flow rate is set to Q0×(1-β) to Q0×(1+β).

[0037] As an optional implementation, α can be 5% to 10%, and β can be 5% to 20%; wherein, the lower limit of the allowable range of liquid flow rate is used to determine whether there is insufficient effective liquid supply at the liquid nozzle 112, and the upper and lower limits of the allowable range of post-pump pressure are used to distinguish the abnormality type.

[0038] Furthermore, the normal correspondence data table should at least include the speed range of the electronic circulation pump 4, the actual speed of the electronic circulation pump 4, the reference value of the pump post pressure, the allowable range of the pump post pressure, the reference value of the injection flow rate, and the allowable range of the injection flow rate.

[0039] Preferably, the normal correspondence data table is stored in the data storage unit 84 and can be re-established or corrected after subsequent maintenance, replacement of insulating coolant 2, replacement of electronic circulation pump 4, or adjustment of spray pipeline 63.

[0040] It should be noted that the aforementioned normal correspondence data table is neither a single pressure threshold table nor a single flow rate threshold table, but rather a correspondence table that uses the rotational speed of the electronic circulating pump 4 as an index and uses the pump post-pump pressure and injection flow rate as mutually verifying parameters. S2. During the operation of the liquid cooler 1, the controller 81 reads the liquid level of the insulating coolant 2 in the coolant tank 11, the current speed of the electronic circulation pump 4, the current pump pressure, the current spray flow rate, the supply temperature, and the return temperature. First, it performs a liquid level pre-judgment based on the liquid level of the insulating coolant 2. When the liquid level of the insulating coolant 2 is at the allowable operating liquid level, it retrieves the corresponding allowable pump pressure range and allowable spray flow rate range from the normal correspondence data table based on the current speed of the electronic circulation pump 4.

[0041] The allowable operating liquid level refers to the lowest safe liquid level that allows the return port 111, the inlet of the electronic circulation pump 4, and the spray circulation path to maintain a continuous liquid supply. Preferably, the allowable operating liquid level can be higher than the height of the inlet of the electronic circulation pump 4 or the return port 111, with a safety margin reserved to prevent cavitation caused by liquid level fluctuations, evaporation losses, or short-term tilting. When the liquid level of the insulating coolant 2 is lower than the allowable operating liquid level, the controller 81 prioritizes low liquid level protection and does not classify the insufficient spray flow in this state as an abnormal spray effectiveness.

[0042] Specifically, after the liquid cooler 1 enters normal operation, the controller 81 periodically reads the signals from the liquid level sensor 73, the pump pressure sensor 71, the liquid spray flow sensor 72, the liquid supply temperature sensor 74, and the liquid return temperature sensor 75, and at the same time reads the current speed of the electronic circulation pump 4, the operating status of the fan 52, and the opening status of the regulating valve 53.

[0043] The controller 81 first determines whether the level of the insulating coolant 2 in the coolant tank 11 has reached the allowable operating level. If the level of the insulating coolant 2 is lower than the allowable operating level, the controller 81 prohibits the electronic circulation pump 4 from starting, or limits the electronic circulation pump 4 from continuing to increase its speed, and outputs a low level alarm. At this time, insufficient spray flow is no longer treated as an abnormality in spray effectiveness, because in this state, insufficient spray flow is a protection state caused by abnormal level, and priority should be given to prompting for replenishment or checking for leaks.

[0044] If the level of the insulating coolant 2 is at the allowable operating level, the controller 81 retrieves the corresponding allowable range of pump post-pressure and allowable range of injection flow from the normal correspondence data table based on the current speed of the electronic circulation pump 4. When the current speed of the electronic circulation pump 4 is between two calibrated speed gears, the controller 81 selects the more stringent range among the adjacent gears as the judgment basis, or performs interpolation calculations based on the reference data of the adjacent calibrated speed gears to obtain the allowable range of pressure and allowable range of flow that matches the current speed.

[0045] The "more stringent range" refers to a conservative judgment range selected to avoid misjudging abnormal states as normal states when the current speed of the electronic circulating pump 4 is between two calibrated speed levels and the controller 81 is not performing interpolation calculations. Specifically, for the injection flow rate, the more stringent range is an allowable range with a higher lower limit for flow rate; for the pump outlet pressure, the more stringent range is an allowable range that is more conducive to identifying pressure that is too high or too low.

[0046] It should be noted that in actual implementation, the stricter range is mainly used in situations where the controller 81 cannot interpolate accurately or where conservative protection judgment is required; when the sensor data is stable and the data of adjacent calibration gears are complete, it is preferable to use interpolation to obtain an allowable range that better matches the current speed.

[0047] The reference data for adjacent calibration speed gears refers to the actual speed of the electronic circulation pump 4, the reference value of the pump post-pump pressure, the reference value of the injection flow rate, and the corresponding allowable range of pump post-pump pressure and allowable range of injection flow rate for the two speed gears adjacent to the current speed of the electronic circulation pump 4 that have been stored in the normal correspondence data table in S1.

[0048] As an optional implementation, the current rotational speed of the electronic circulating pump 4 is v, which is between the first calibrated rotational speed v1 and the second calibrated rotational speed v2. The reference values ​​for the pump post-pressure and the injection flow rate corresponding to the first calibrated rotational speed v1 are P1 and Q1, respectively. The reference values ​​for the pump post-pressure and the injection flow rate corresponding to the second calibrated rotational speed v2 are P2 and Q2, respectively. Then, the controller 81 calculates the reference value for the pump post-pressure P and the reference value for the injection flow rate Q corresponding to the current rotational speed v using a linear interpolation method. Wherein, P = P1 + (P2 - P1) × (v - v1) / (v2 - v1), Q = Q1 + (Q2 - Q1) × (v - v1) / (v2 - v1). Based on the pump post-pressure deviation coefficient and the injection flow rate deviation coefficient, the controller 81 forms the allowable range of the pump post-pressure and the allowable range of the injection flow rate corresponding to the current rotational speed v.

[0049] As another optional implementation, the controller 81 can also directly interpolate the upper limit of the allowable range of the pump post-pressure, the lower limit of the allowable range of the pump post-pressure, the upper limit of the allowable range of the liquid injection flow rate, and the lower limit of the allowable range of the liquid injection flow rate for two adjacent calibrated speed gears, so as to obtain the allowable range corresponding to the current speed.

[0050] It is important to emphasize that the supply and return temperatures are used to verify the trend and priority of the spraying effectiveness assessment. Specifically, the supply temperature sensor 74 detects the temperature of the insulating coolant 2 before it enters the spraying pipe 63, and the return temperature sensor 75 detects the temperature of the insulating coolant 2 after it absorbs heat from the server 3. The controller 81 determines whether the spraying anomaly has affected the heat dissipation of the server 3 based on the temperature difference between the return and supply temperatures, the rate of increase of the return temperature, and the trend of the supply temperature.

[0051] If the current liquid flow rate is lower than the allowable range of the corresponding liquid flow rate, and the temperature difference between the return liquid temperature and the supply liquid temperature continues to increase, or the rate of increase of the return liquid temperature exceeds the preset temperature rise rate threshold, the controller 81 can increase the priority of abnormal handling, shorten the speed verification time, or directly enter the corresponding abnormal handling process.

[0052] If the pump pressure and the injection flow rate have deviated from the normal correspondence at the current speed of the electronic circulating pump 4, and the return liquid temperature has not yet reached the alarm threshold, the controller 81 will still perform injection effectiveness judgment and abnormal handling. At this time, the supply liquid temperature and return liquid temperature are only used to assist in confirming the abnormal trend, and are not used as the only triggering conditions.

[0053] S3, the controller 81 judges the effectiveness and abnormality type of the spraying based on the matching relationship between the current pump post pressure, the current spray flow rate and the corresponding allowable range of pump post pressure and allowable range of spray flow rate, and determines the intermediate state of normal spraying effectiveness, abnormal resistance of spraying pipeline 63, abnormal liquid supply capacity of electronic circulation pump 4, or speed verification.

[0054] Specifically, the controller 81 compares the current post-pump pressure and the current injection flow rate with the allowable range of post-pump pressure and allowable range of injection flow rate called in S2, respectively.

[0055] If the current downstream pressure is within the allowable range and the current spray flow rate is within the allowable range, the controller 81 determines that the spray nozzle 112 is in an effective liquid supply state, which means the spray effectiveness is normal. At this time, the liquid cooler 1 operates according to the conventional temperature control logic, that is, it adjusts the electronic circulation pump 4, the fan 52 and the regulating valve 53 based on the supply temperature, return temperature or changes in the server 3 load.

[0056] If the current injection flow rate is lower than the corresponding allowable injection flow rate range, and the current downstream pressure is higher than the corresponding allowable downstream pressure range or close to the upper limit of the corresponding allowable downstream pressure range, the controller 81 determines it to be an abnormal state, and the abnormality type is abnormal resistance in the injection line 63. This situation indicates that the electronic circulation pump 4 has generated a high output pressure, but the insulating coolant 2 has not entered the injection line 63 at a matching flow rate. The abnormal location may be downstream of the electronic circulation pump 4; for example, there may be increased resistance, partial blockage, bubble accumulation, or impurity adhesion at the liquid side channel of the dry cooler 51, the supply line 62, the injection line 63, or the injection port 112 downstream of the electronic circulation pump 4.

[0057] It should be noted that the allowable pressure range after the pump includes a lower pressure limit and an upper pressure limit. If the current pressure after the pump does not exceed the upper pressure limit but is within the adjacent range of the upper pressure limit, and the current liquid flow rate is lower than the allowable liquid flow rate range, the controller 81 can still treat it as an abnormal resistance of the liquid injection pipeline 63. The adjacent range is determined based on the width of the allowable pressure range; for example, it is the range between the upper pressure limit value and the upper pressure limit value after the pressure limit is shifted downward by a preset proportion; the preset proportion is determined based on the accuracy of the pressure sensor 71 after the pump, the resistance fluctuation range of the liquid cooler 1 pipeline, and the viscosity of the insulating coolant 2.

[0058] If the current injection flow rate is lower than the corresponding allowable injection flow rate range, and the current post-pump pressure is also lower than the corresponding allowable post-pump pressure range, the controller 81 determines it to be an abnormal state, and the abnormality type is abnormal liquid supply capacity of the electronic circulation pump 4. This situation indicates that the electronic circulation pump 4 has failed to establish the required output pressure at the current speed, and the injection pipeline 63 has not obtained sufficient flow. The abnormality may be caused by air resistance at the inlet of the electronic circulation pump 4, incomplete filling of the pump chamber, performance degradation of the electronic circulation pump 4, blockage of the inlet filter, or continuous gas entry into the return pipeline 61.

[0059] If the current injection flow rate is lower than the corresponding allowable injection flow rate, but the current post-pump pressure is within the corresponding allowable post-pump pressure range, this is considered an abnormal state. The controller 81 does not immediately make a single abnormality type judgment, but instead enters the speed verification process.

[0060] The specific process of speed verification is as follows: Controller 81 increases the electronic circulation pump 4 to a higher verification speed and maintains it for a preset verification time; during the operation at the preset verification speed, controller 81 continuously reads the pump downstream pressure and injection flow rate. If the injection flow rate recovers to the allowable range of injection flow rate corresponding to the verification speed as the speed increases, the previous state is determined to be a short-term flow fluctuation, and automatic operation is resumed; if the injection flow rate still does not recover, it is further classified into abnormal resistance of injection pipeline 63 or abnormal liquid supply capacity of electronic circulation pump 4 based on the trend of pump downstream pressure change at the verification speed.

[0061] S4. The controller 81 executes the corresponding exception handling process based on the determined exception type. The exception handling process includes at least one of pulse flushing process, low-speed exhaust process, segmented speed-up verification process, and backup electronic circulation pump switching process.

[0062] When S3 determines that the resistance of the spray pipe 63 is abnormal, the controller 81 performs a pulse flushing process. Specifically, the controller 81 increases the speed of the electronic circulation pump 4 from its current operating speed to the flushing speed and maintains it for a preset flushing time, then decreases the speed of the electronic circulation pump 4 back to its current operating speed or an intermediate speed. The speed-up and speed-down actions can be repeated a preset number of times. Through the flow pulsation generated by the alternating speed-up and speed-down, the insulating coolant 2 can form a flushing effect in the supply pipe 62 and the spray pipe 63, thereby disturbing and removing attached impurities, local air bubbles, or slight blockages near the spray nozzle 112. After each pulse flushing, the controller 81 rereads the current speed of the electronic circulation pump 4, the pump outlet pressure, and the spray flow rate, and then calls the normal correspondence data table again for verification.

[0063] If the pump pressure and spray flow rate recover to the allowable range corresponding to the current speed of the electronic circulating pump 4, the controller 81 will release the abnormal resistance state of the spray pipeline 63, record the spray recovery event, and resume automatic temperature control operation; if it still fails to recover after reaching the preset flushing number, the controller 81 will output an abnormal resistance alarm for the spray pipeline 63 and upload the abnormal status and processing results through the remote IoT communication component 9.

[0064] As an optional implementation, the preset number of acceleration and deceleration actions can be 2 to 5 times, preferably 3 times. If the preset number is too small, it may be difficult to effectively disturb the attached impurities, local air bubbles, or slight blockages at the spray nozzle 112; if the preset number is too large, it may cause the electronic circulation pump 4 to frequently change speed, increasing system fluctuations and energy consumption. Therefore, the controller 81 can dynamically determine whether to terminate the pulse flushing process in advance based on the recovery of the spray flow, the trend of the pump downstream pressure, and the trends of the supply and return liquid temperatures.

[0065] For example, after the first or second pulse flushing, when the spray flow rate has recovered to the allowable range corresponding to the current rotational speed of the electronic circulation pump 4, and the downstream pressure has recovered to the corresponding allowable range, the controller 81 can terminate the remaining flushing cycles in advance and record the processing result as "flushing recovered". If the cycle is not recovered after the preset number of flushing cycles, the controller 81 will record the processing result as "flushing not recovered" and upload an alarm for abnormal resistance in the spray pipeline 63.

[0066] Furthermore, when S3 determines that the liquid supply capacity of the electronic circulation pump 4 is abnormal, the controller 81 performs low-speed exhaust and segmented speed-up verification processing.

[0067] Specifically, the controller 81 first reduces the electronic circulation pump 4 to a low exhaust speed, so that the insulating coolant 2 circulates at a lower flow rate, so that the gas in the inlet or pump chamber of the electronic circulation pump 4 is discharged with the insulating coolant 2. After the low-speed exhaust operation is completed, the controller 81 increases the speed of the electronic circulation pump 4 in stages according to the order of low speed, medium speed and high speed. After each speed stabilizes, the pump pressure and the liquid flow rate are read respectively, and then it is determined whether they have returned to the corresponding allowable range.

[0068] If the pump pressure and spray flow gradually recover during the segmented speed-up process, the controller 81 determines that the abnormality in the liquid supply capacity has been resolved and resumes automatic temperature control operation; if the pump pressure and spray flow are still low after the segmented speed-up and the liquid level sensor 73 does not trigger a low liquid level alarm, the controller 81 determines that the electronic circulation pump 4 has performance degradation or continuous inlet air resistance.

[0069] It should be noted that the electronic circulation pump 4 in this embodiment adopts a single pump structure or a main-standby dual pump structure. If the electronic circulation pump 4 adopts a single pump structure, and the pump pressure and liquid flow rate are still low after low-speed exhaust and segmented speed-up verification, the controller 81 will not perform the pump switching action, but will restrict the electronic circulation pump 4 from continuing to increase its speed, output an alarm indicating abnormal liquid supply capacity of the electronic circulation pump 4, and mark the electronic circulation pump 4 as a state to be checked.

[0070] If the electronic circulation pump 4 adopts a main / standby dual-pump structure, the electronic circulation pump 4 includes a first electronic circulation pump 41 and a second electronic circulation pump 42, which can be set up with one in use and the other as a standby. If the current main electronic circulation pump still cannot establish a pump post-pressure and injection flow rate matching the current speed after low-speed exhaust and segmented speed-up verification, and the liquid level sensor 73 does not trigger a low liquid level alarm, then the controller 81 starts the standby electronic circulation pump. After the standby electronic circulation pump establishes a stable injection flow rate, the controller 81 marks the original main electronic circulation pump as pending maintenance and writes the alarm information, switching time, pump post-pressure before and after the switching, injection flow rate, and switching result into the data storage unit 84.

[0071] S5. Based on the normal correspondence data table, current operating parameters, spray effectiveness status, abnormality type, and execution result of the abnormality handling process, the controller 81 uploads the operating data and abnormality handling data of the liquid cooler 1 through the remote IoT communication component 9; and performs permission legality verification and equipment security range verification when receiving remote control commands. When the communication of the remote IoT communication component 9 is interrupted, it continues to perform local operating parameter acquisition, spray effectiveness judgment, abnormality handling, and post-processing review.

[0072] Specifically, after the normal correspondence data table is established in S1, the controller 81 stores the version information, establishment time, number of speed gears, and corresponding device number of the normal correspondence data table in the data storage unit 84; during the operation parameter acquisition process in S2, the controller 81 periodically generates operation data records, which include the current speed of the electronic circulation pump 4, the current pump outlet pressure, the current injection flow rate, the liquid level status, the supply liquid temperature, and the return liquid temperature; after the injection effectiveness judgment is completed in S3, the controller 81 writes the injection effectiveness status and abnormality type into the operation data record; after the abnormality handling process is executed in S4, the controller 81 continues to write the processing action and processing result.

[0073] The controller 81 records and uploads the aforementioned operational data to the remote platform via the remote IoT communication component 9, enabling the remote platform to obtain the complete process from parameter acquisition, anomaly judgment, anomaly handling to processing verification. After receiving information about abnormal spray effectiveness, the remote platform can send alarm confirmation commands, re-judgment commands, pulse flushing commands, low-speed exhaust commands, segmented speed-up verification commands, standby pump switching commands, or parameter correction commands to the controller 81.

[0074] After receiving a remote control command, controller 81 first performs an authorization verification. If the authorization verification fails, controller 81 refuses to execute the remote control command and records the reason for refusal. If the authorization verification passes, controller 81 then performs a device safety range verification. If the device safety range verification fails, controller 81 refuses to execute the remote control command and returns the reason for refusal to the remote platform. When both authorization verification and device safety range verification pass, controller 81 executes the corresponding remote control command and uploads the post-pump pressure, spray flow rate, spray effectiveness status, and execution results to the remote platform.

[0075] It should be noted that the permission validity verification refers to the controller 81 verifying the source, identity, and operation permissions of the remote control command before executing the remote control command issued by the remote platform.

[0076] As an optional implementation, the permission validity verification includes at least one of the following: device number verification, remote platform account or key verification, instruction signature verification, instruction timestamp verification, instruction sequence number verification, and operator role permission verification. The controller 81 will only proceed with device security scope verification if the remote control instruction originates from an authorized remote platform or authorized maintenance personnel, and if the remote control instruction is an instruction permitted to be executed within the corresponding permission scope.

[0077] The device safety range verification refers to the controller 81 further determining whether the remote control command meets the safety execution conditions of the liquid cooler 1 under the current operating state after confirming that the remote control command has legal authority.

[0078] As an optional implementation, the equipment safety range verification includes at least one of the following: liquid level safety verification, maximum safe speed verification of electronic circulation pump 4, minimum operating speed verification of electronic circulation pump 4, availability status verification of standby electronic circulation pump, operating status verification of fan 52, opening range verification of regulating valve 53, safety threshold verification of supply and return liquid temperatures, and matching verification between the current anomaly type and remote control command.

[0079] For example, when the level sensor 73 detects that the level of the insulating coolant 2 is lower than the allowable operating level, the controller 81 refuses to execute the command requiring the electronic circulation pump 4 to run at high speed, even if the remote control command has valid authorization; when the remote control command requires the electronic circulation pump 4 to run beyond the maximum safe speed, the controller 81 refuses to execute the command; when the remote control command requires switching to the backup electronic circulation pump, and the backup electronic circulation pump is in a faulty, offline, or incomplete self-test state, the controller 81 refuses to execute the command and returns the reason for refusal to the remote platform.

[0080] As one possible scenario in this embodiment, when the remote IoT communication component 9 experiences a communication interruption, the controller 81 does not stop the local spray effectiveness judgment process, but continues to execute the local judgment, processing, and verification processes S2 to S4. The spray effectiveness anomaly records, processing actions, processing results, and key operational data generated during the communication interruption are all stored in the data storage unit 84. After communication is restored, the controller 81 retransmits the data from the communication interruption period to the remote platform, enabling the remote platform to obtain a complete record of the abnormal process.

[0081] That is, through the above S1 to S5, under the premise that the level of insulating coolant 2 in the coolant tank 11 is normal, the method of this embodiment establishes the rotation speed, post-pump pressure, and spray flow rate of the electronic circulation pump 4 as interrelated spray effectiveness judgment parameters, and uses the supply temperature and return temperature as auxiliary verification parameters. Compared with the method of adjusting only after the return temperature rises, this embodiment can identify the spray abnormal trend before the local hot spot of the server 3 has obviously formed, and perform self-recovery, backup pump switching, and remote closed-loop processing according to the abnormality type.

[0082] Example 2 Secondly, this embodiment provides a liquid cooler temperature control system that integrates multi-parameter sensing and remote IoT. The system is used to execute the liquid cooler temperature control method that integrates multi-parameter sensing and remote IoT as described in Embodiment 1. like Fig. 2 As shown, the system includes a liquid cooling cabinet 1, which includes a coolant tank 11, an insulating coolant 2, a server 3, an electronic circulation pump 4, a cooling adjustment component 5, a coolant pipeline 6, a spray effectiveness detection component 7, a control component 8, and a remote IoT communication component 9.

[0083] The cooling regulation assembly 5 includes a dry cooler 51, a fan 52, and a regulating valve 53. The coolant pipeline 6 includes a return pipeline 61, a supply pipeline 62, and a spray pipeline 63. The spray effectiveness detection assembly 7 includes a pump post-pressure sensor 71, a spray flow sensor 72, a liquid level sensor 73, a supply temperature sensor 74, and a return temperature sensor 75. The control assembly 8 includes a controller 81 and a data storage unit 84.

[0084] The coolant tank 11 is used to contain insulating coolant 2, and the server 3 is at least partially immersed in the insulating coolant 2; the coolant tank 11 is provided with a return port 111 and a spray port 112; the return port 111 is used to receive the insulating coolant 2 after absorbing the heat of the server 3, and the spray port 112 is used to spray the insulating coolant 2 into the area where the server 3 is located or near the heat-generating components of the server 3.

[0085] The electronic circulation pump 4 is used to drive the insulating coolant 2 to circulate. Under the drive of the electronic circulation pump 4, the insulating coolant 2 passes through the return pipe 61, the electronic circulation pump 4, the dry cooler 51, the supply pipe 62 and the spray pipe 63 in sequence, and is sprayed out from the spray nozzle 112.

[0086] The dry cooler 51 is used to dissipate heat from the circulating insulating coolant 2; the fan 52 is used to enhance the heat dissipation capacity of the dry cooler 51; and the regulating valve 53 is used to regulate the flow rate or opening status in the coolant circulation path.

[0087] The downstream pressure sensor 71 is located downstream of the electronic circulating pump 4 and is used to detect the downstream pressure formed by the electronic circulating pump 4 at the current speed; the spray flow sensor 72 is used to detect the spray flow of the spray pipe 63; the liquid level sensor 73 is used to detect the liquid level of the insulating coolant 2 in the coolant tank 11; the supply temperature sensor 74 is used to detect the temperature of the insulating coolant 2 before entering the spray pipe 63; and the return temperature sensor 75 is used to detect the temperature of the insulating coolant 2 after absorbing heat from the server 3.

[0088] The controller 81 is connected to the electronic circulating pump 4, the fan 52, the regulating valve 53, the pump post-pressure sensor 71, the spray flow sensor 72, the liquid level sensor 73, the supply liquid temperature sensor 74, the return liquid temperature sensor 75, the data storage unit 84, and the remote IoT communication component 9.

[0089] The data storage unit 84 is used to store the normal correspondence data table, operating parameters, spray effectiveness status, anomaly type, anomaly handling actions, and post-handling verification results. The normal correspondence data table includes the speed setting of the electronic circulation pump 4, the actual speed of the electronic circulation pump 4, the pump downstream pressure reference value, the allowable range of the pump downstream pressure, the spray flow reference value, and the allowable range of the spray flow.

[0090] After the liquid cooler 1 is installed and filled with liquid, the controller 81 controls the electronic circulation pump 4 to operate stably at multiple speed levels, and reads the pump pressure detected by the pump pressure sensor 71 and the spray flow rate detected by the spray flow sensor 72. Based on the pump pressure and spray flow rate corresponding to each speed level, the controller 81 establishes a normal correspondence data table and stores the normal correspondence data table in the data storage unit 84.

[0091] During the operation of the liquid coolant cabinet 1, the controller 81 reads the liquid level of the insulating coolant 2 detected by the liquid level sensor 73 and performs a pre-level judgment. When the liquid level of the insulating coolant 2 is lower than the allowable operating level, the controller 81 prohibits the electronic circulation pump 4 from starting, or limits the electronic circulation pump 4 from continuing to increase its speed, and outputs a low liquid level alarm. When the liquid level of the insulating coolant 2 is at the allowable operating level, the controller 81 reads the current speed of the electronic circulation pump 4, the current pump outlet pressure, the current injection flow rate, the supply liquid temperature, and the return liquid temperature.

[0092] Based on the current rotational speed of the electronic circulation pump 4, the controller 81 retrieves the corresponding allowable range of post-pump pressure and allowable range of injection flow rate from the normal correspondence data table stored in the data storage unit 84. If the current rotational speed of the electronic circulation pump 4 is between two calibrated speed settings, the controller 81 performs interpolation calculations based on the reference data of the adjacent calibrated speed settings, or selects the more stringent range among the adjacent settings as the judgment basis.

[0093] The controller 81 compares the current post-pump pressure and the current injection flow rate with the corresponding allowable post-pump pressure range and allowable injection flow rate range, respectively. If the current post-pump pressure is within the corresponding allowable post-pump pressure range and the current injection flow rate is within the corresponding allowable injection flow rate range, the controller 81 determines that the injection port 112 is in an effective liquid supply state and adjusts the electronic circulation pump 4, the fan 52, and the regulating valve 53 according to the conventional temperature control logic.

[0094] If the current spray flow rate is lower than the corresponding allowable spray flow rate range, and the current post-pump pressure is higher than the corresponding allowable post-pump pressure range, the controller 81 determines that the resistance of the spray line 63 is abnormal. At this time, the controller 81 controls the electronic circulation pump 4 to perform pulse flushing, causing the electronic circulation pump 4 to increase and decrease speed between the flushing speed and the current operating speed or intermediate speed, so as to create flow pulsation in the supply line 62 and the spray line 63.

[0095] If the current injection flow rate is lower than the corresponding allowable injection flow rate range, and the current post-pump pressure is lower than the corresponding allowable post-pump pressure range, the controller 81 determines that the electronic circulation pump 4 has an abnormal liquid supply capacity. At this time, the controller 81 controls the electronic circulation pump 4 to perform low-speed venting, and after the low-speed venting, performs segmented speed-up verification to determine whether the post-pump pressure and injection flow rate have recovered to the allowable range of the corresponding speed gear.

[0096] If the current injection flow rate is lower than the corresponding allowable injection flow rate range, but the current post-pump pressure is within the corresponding allowable post-pump pressure range, the controller 81 controls the electronic circulation pump 4 to increase to a higher verification speed, and rereads the post-pump pressure and injection flow rate at the verification speed. If the injection flow rate recovers to the allowable injection flow rate range corresponding to the verification speed, the controller 81 determines that the previous state was a short-term flow fluctuation; if the injection flow rate still does not recover, the controller 81, combined with the trend of post-pump pressure changes at the verification speed, further determines that the injection pipeline 63 has abnormal resistance or the electronic circulation pump 4 has abnormal liquid supply capacity.

[0097] When the electronic circulation pump 4 adopts a main and backup dual-pump structure, the electronic circulation pump 4 includes a first electronic circulation pump 41 and a second electronic circulation pump 42. If the current main electronic circulation pump still cannot establish a pump post-pressure and injection flow rate matching the current speed after low-speed exhaust treatment and segmented speed-up verification treatment, and the liquid level sensor 73 does not trigger a low liquid level alarm, then the controller 81 starts the backup electronic circulation pump. After the backup electronic circulation pump establishes a stable injection flow rate, the controller 81 marks the original main electronic circulation pump as pending maintenance and writes the switching time, pump post-pressure before and after the switching, injection flow rate, and switching result into the data storage unit 84.

[0098] After the abnormal handling process is completed, the controller 81 reads the current speed, current downstream pressure, and current injection flow rate of the electronic circulation pump 4 again, and verifies them again based on the normal correspondence data table. If the current downstream pressure and current injection flow rate return to the allowable range corresponding to the current speed of the electronic circulation pump 4, the controller 81 removes the corresponding abnormal state and resumes automatic temperature control operation. If the current downstream pressure and current injection flow rate still do not return to the corresponding allowable range, the controller 81 maintains the abnormal state and outputs the corresponding alarm information.

[0099] The supply and return liquid temperatures detected by the supply liquid temperature sensor 74 and the return liquid temperature sensor 75 are used to perform trend verification on the spraying effectiveness judgment results. When the temperature difference between the return liquid temperature and the supply liquid temperature continues to increase, or when the rate of increase of the return liquid temperature exceeds the preset temperature rise rate threshold, the controller 81 raises the priority of abnormal handling.

[0100] The remote IoT communication component 9 is connected to the controller 81 and is used to upload the normal correspondence data table, current operating parameters, spray effectiveness status, anomaly type, anomaly handling actions, post-handling verification results, and alarm information to the remote platform. After receiving the remote control command, the controller 81 performs permission legality verification and equipment security range verification, and executes the corresponding remote control command after the verification is passed.

[0101] When the remote IoT communication component 9 experiences a communication interruption, the controller 81 continues to perform local operating parameter acquisition, spray effectiveness judgment, anomaly handling, and post-processing verification, and stores the operating data, anomaly handling data, and verification results generated during the communication interruption in the data storage unit 84. After communication is restored, the controller 81 transmits the data from the communication interruption period to the remote platform via the remote IoT communication component 9.

[0102] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the embodiments of apparatus, devices, and non-volatile computer storage media are basically similar to the method embodiments, so the descriptions are relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0103] The foregoing has described specific embodiments of this specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in a different order than that shown in the embodiments and may still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require the specific or sequential order shown to achieve the desired result. In some embodiments, multitasking and parallel processing are possible or may be advantageous.

[0104] The above description is merely one or more embodiments of this specification and is not intended to limit this specification. Various modifications and variations can be made to the one or more embodiments of this specification by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of one or more embodiments of this specification should be included within the scope of the claims of this specification.

Claims

1. A method for temperature control of a liquid cooler integrating multi-parameter sensing and remote IoT, applied to a liquid cooler (1), wherein the liquid cooler (1) includes a coolant tank (11), an electronic circulation pump (4), a spray pipe (63), a pump post-pressure sensor (71), a spray flow sensor (72), a liquid level sensor (73), a supply liquid temperature sensor (74), a return liquid temperature sensor (75), a controller (81), and a remote IoT communication component (9); characterized in that, The method includes: S1. After the liquid cooler (1) is installed and filled with liquid, the controller (81) controls the electronic circulation pump (4) to run stably at multiple speed levels, and collects the pump pressure and spray flow corresponding to each speed level through the pump pressure sensor (71) and the spray flow sensor (72) respectively, forming a normal correspondence data table between the speed level of the electronic circulation pump (4), the actual speed of the electronic circulation pump (4), the pump pressure and the spray flow. The normal correspondence data table is used to determine the corresponding allowable range of pump pressure and allowable range of spray flow. S2. During the operation of the liquid cooler (1), the controller (81) reads the liquid level of the insulating coolant (2) in the coolant tank (11), the current speed of the electronic circulation pump (4), the current pump pressure, the current spray flow rate, the supply temperature and the return temperature; firstly, it performs a liquid level pre-judgment based on the liquid level of the insulating coolant (2), and when the liquid level of the insulating coolant (2) is at the allowable operating liquid level, it calls the corresponding pump pressure allowable range and spray flow allowable range from the normal correspondence data table based on the current speed of the electronic circulation pump (4); S3, The controller (81) makes a judgment on the effectiveness and abnormality type of the spraying based on the matching relationship between the current pump post pressure, the current spray flow rate and the corresponding allowable range of pump post pressure and allowable range of spray flow rate, and determines the intermediate state of normal spraying effectiveness, abnormal resistance of spraying pipeline (63), abnormal liquid supply capacity of electronic circulation pump (4) or speed verification required. S4. The controller (81) executes the corresponding exception handling process based on the determined exception type. The exception handling process includes at least one of pulse flushing process, low-speed exhaust process, segmented speed-up verification process, and backup electronic circulation pump switching process. S5. The controller (81) uploads the operating data and abnormal handling data of the liquid cooler (1) through the remote IoT communication component (9) based on the normal correspondence data table, current operating parameters, spray effectiveness status, abnormal type and abnormal handling process execution results; and performs permission legality verification and equipment security range verification when receiving remote control instructions. When the communication of the remote IoT communication component (9) is interrupted, it continues to perform local operating parameter acquisition, spray effectiveness judgment, abnormal handling and post-processing review.

2. The liquid cooler temperature control method integrating multi-parameter sensing and remote IoT as described in claim 1, characterized in that, The coolant tank (11) is used to contain insulating coolant (2), and the electronic circulation pump (4) is used to drive the insulating coolant (2) to circulate. The liquid cooling cabinet (1) also includes a server (3), a cooling regulation component (5), a coolant pipeline (6), a spray effectiveness detection component (7), and a control component (8). The server (3) is at least partially submerged in the insulating coolant (2), and the coolant tank (11) is provided with a return port (111) and a spray port (112). The electronic circulation pump (4) is a single pump structure or a main and backup dual pump structure; when the electronic circulation pump (4) is a main and backup dual pump structure, the electronic circulation pump (4) includes a first electronic circulation pump (41) and a second electronic circulation pump (42). The coolant pipeline (6) is used to form a coolant circulation path, and the coolant pipeline (6) includes a return pipeline (61), a supply pipeline (62) and the spray pipeline (63). The cooling regulating component (5) is used to dissipate heat or regulate the flow of the insulating coolant (2), and the cooling regulating component (5) includes a dry cooler (51), a fan (52) and a regulating valve (53). The spray effectiveness detection component (7) is used to collect spray effectiveness judgment parameters, and the spray effectiveness detection component (7) includes the pump post pressure sensor (71), the spray flow sensor (72), the liquid level sensor (73), the supply liquid temperature sensor (74) and the return liquid temperature sensor (75). The control component (8) is used to perform parameter acquisition, data table establishment, anomaly judgment and anomaly handling, and the control component (8) includes the controller (81) and the data storage unit (84), the data storage unit (84) is used to store the normal correspondence data table; The pump pressure sensor (71), the liquid flow sensor (72), the liquid level sensor (73), the liquid supply temperature sensor (74), the liquid return temperature sensor (75), the electronic circulation pump (4), the cooling adjustment component (5), the data storage unit (84), and the remote IoT communication component (9) are respectively connected to the controller (81).

3. The liquid cooler temperature control method integrating multi-parameter sensing and remote IoT as described in claim 2, characterized in that, In S1, after the liquid discharge from the spray nozzle (112) is stable, and the fluctuation amplitude of the pump pressure detected by the pump pressure sensor (71) and the spray flow rate detected by the spray flow sensor (72) within the preset stable time is less than the preset fluctuation threshold, the controller (81) controls the electronic circulation pump (4) to run in sequence according to multiple speed levels. At each speed setting, the controller (81) maintains the electronic circulation pump (4) in stable operation for a preset sampling time, and reads the pump pressure and spray flow rate multiple times within the corresponding preset sampling time. The controller (81) removes abrupt changes and calculates the average or moving average of the collected pump post pressure and spray flow values, and uses the processed pump post pressure and spray flow values ​​as the pump post pressure reference value and spray flow reference value at the corresponding speed gear. After obtaining the reference values ​​of the pump post-pressure and the injection flow rate, the controller (81) sets preset deviation coefficients for the pump post-pressure and the injection flow rate respectively. The allowable range of the pump post-pump pressure is formed based on the pump post-pump pressure reference value and the pump post-pump pressure deviation coefficient; the allowable range of the injection flow rate is formed based on the injection flow rate reference value and the injection flow rate deviation coefficient. The normal correspondence data table includes at least the speed range of the electronic circulation pump (4), the actual speed of the electronic circulation pump (4), the reference value of the pump post pressure, the allowable range of the pump post pressure, the reference value of the liquid injection flow rate, and the allowable range of the liquid injection flow rate.

4. The liquid cooler temperature control method integrating multi-parameter sensing and remote IoT as described in claim 1, characterized in that, In S2, if the liquid level sensor (73) detects that the liquid level of the insulating coolant (2) in the coolant tank (11) is lower than the allowable operating liquid level, the controller (81) prohibits the electronic circulation pump (4) from starting, or limits the electronic circulation pump (4) from continuing to increase its speed and outputs a low liquid level alarm. If the level sensor (73) detects that the level of the insulating coolant (2) in the coolant tank (11) is at the allowable operating level, the controller (81) retrieves the corresponding allowable range of pump post-pressure and allowable range of spray flow from the normal correspondence data table based on the current rotation speed of the electronic circulation pump (4). If the current speed of the electronic circulating pump (4) is between two calibrated speed gears, the controller (81) performs interpolation calculations based on the reference data of the adjacent calibrated speed gears, or selects the more stringent range among the adjacent gears as the basis for judgment.

5. The liquid cooler temperature control method integrating multi-parameter sensing and remote IoT as described in claim 2, characterized in that, In S3, if the current pump pressure is within the allowable range of the corresponding pump pressure and the current liquid flow rate is within the allowable range of the corresponding liquid flow rate, the controller (81) determines that the liquid outlet (112) is in an effective liquid supply state. If the current injection flow rate is lower than the corresponding injection flow rate allowable range, and the current pump post pressure is higher than the corresponding pump post pressure allowable range or close to the upper limit of the corresponding pump post pressure allowable range, the controller (81) determines that the resistance of the injection pipeline (63) is abnormal. If the current spray flow rate is lower than the corresponding allowable spray flow rate and the current pump pressure is lower than the corresponding allowable pump pressure, the controller (81) determines that the electronic circulation pump (4) has an abnormal liquid supply capacity. If the current injection flow rate is lower than the corresponding injection flow rate allowable range, while the current pump post-pressure is within the corresponding pump post-pressure allowable range, the controller (81) determines it to be an intermediate state that requires speed verification.

6. The liquid cooler temperature control method integrating multi-parameter sensing and remote IoT as described in claim 5, characterized in that, When the controller (81) determines that the intermediate state requires speed verification, the controller (81) will increase the electronic circulation pump (4) to a higher verification speed and maintain it for a preset verification time. During the preset verification time, the controller (81) continuously reads the pump post-pressure and injection flow rate; If the spray flow rate recovers to the allowable range of spray flow rate corresponding to the verification speed as the speed of the electronic circulation pump (4) increases, the controller (81) determines that the previous state was a short-term flow fluctuation and resumes automatic operation; If the injection flow rate still does not recover, the controller (81) combines the trend of the change in the pump pressure under the verification speed and further classifies it as abnormal resistance of the injection pipeline (63) or abnormal liquid supply capacity of the electronic circulation pump (4).

7. The liquid cooler temperature control method integrating multi-parameter sensing and remote IoT as described in claim 6, characterized in that, In S4, when the controller (81) determines that the resistance of the spray pipe (63) is abnormal, the controller (81) performs pulse flushing. The pulse flushing process includes: the controller (81) speeds up the electronic circulation pump (4) from the current operating speed to the flushing speed and maintains the preset flushing time, and then slows down the electronic circulation pump (4) to the current operating speed or the intermediate speed; The acceleration and deceleration actions are repeated a preset number of times to create flow pulsations in the liquid supply line (62) and the liquid spraying line (63); After each pulse flushing process, the controller (81) rereads the current speed, pump pressure and spray flow of the electronic circulation pump (4) and calls the normal correspondence data table again for verification.

8. The liquid cooler temperature control method integrating multi-parameter sensing and remote IoT as described in claim 5, characterized in that, In S4, when the controller (81) determines that the liquid supply capacity of the electronic circulation pump (4) is abnormal, the controller (81) performs low-speed exhaust processing and segmented speed-up verification processing. The low-speed exhaust treatment includes: the controller (81) reducing the electronic circulation pump (4) to a low-speed exhaust speed, so that the insulating coolant (2) circulates at a low flow rate to exhaust the gas in the inlet or pump chamber of the electronic circulation pump (4); The segmented speed-up verification process includes: after the low-speed exhaust process is completed, the controller (81) increases the speed of the electronic circulation pump (4) in segments according to the order of low speed, medium speed and high speed, and reads the pump pressure and injection flow rate after each gear stabilizes, and judges whether the pump pressure and injection flow rate have recovered to the corresponding allowable range. When the electronic circulation pump (4) adopts a main and backup dual pump structure, and the current main electronic circulation pump still cannot establish the pump post pressure and liquid flow rate that match the current speed after low-speed exhaust treatment and segmented speed-up verification treatment, and the liquid level sensor (73) does not trigger the low liquid level alarm, the controller (81) starts the backup electronic circulation pump.

9. A liquid cooler temperature control method integrating multi-parameter sensing and remote IoT as described in claim 2, characterized in that, In S5, the controller (81) uploads the normal correspondence data table, current operating parameters, spraying effectiveness status, abnormality type, abnormality handling action, post-processing verification result and alarm information to the remote platform through the remote IoT communication component (9); After receiving the remote control command, the controller (81) first performs a permission validity check; Once the permission validity check passes, the device security scope check is performed; when both the permission validity check and the device security scope check pass, the corresponding remote control command is executed. When the remote IoT communication component (9) experiences a communication interruption, the controller (81) continues to perform local operating parameter acquisition, spray effectiveness judgment, abnormal handling and post-processing review, and stores the operating data, abnormal handling data and review results generated during the communication interruption in the data storage unit (84). After communication is restored, the controller (81) transmits the data during the communication interruption to the remote platform through the remote IoT communication component (9).

10. A liquid cooler temperature control system integrating multi-parameter sensing and remote IoT, the system being used to execute the liquid cooler temperature control method integrating multi-parameter sensing and remote IoT as described in any one of claims 1-9, characterized in that, The system includes a liquid cooler (1), which includes a coolant tank (11), an insulating coolant (2), a server (3), an electronic circulation pump (4), a cooling adjustment component (5), coolant pipelines (6), a spray effectiveness detection component (7), a control component (8), and a remote IoT communication component (9). The coolant tank (11) is used to contain insulating coolant (2), and the server (3) is at least partially immersed in the insulating coolant (2). The coolant tank (11) is provided with a return port (111) and a spray port (112). The electronic circulation pump (4) is used to drive the insulating coolant (2) to circulate, so that the insulating coolant (2) passes through the return pipe (61), the electronic circulation pump (4), the dry cooler (51), the supply pipe (62) and the spray pipe (63) in sequence, and is sprayed out from the spray nozzle (112); The electronic circulation pump (4) is configured as a single pump structure or a main and backup dual pump structure; when the electronic circulation pump (4) is a main and backup dual pump structure, the electronic circulation pump (4) includes a first electronic circulation pump (41) and a second electronic circulation pump (42). The cooling regulating component (5) includes a dry cooler (51), a fan (52) and a regulating valve (53). The dry cooler (51) is used to dissipate heat from the circulating insulating coolant (2). The fan (52) is used to enhance the heat dissipation capacity of the dry cooler (51). The regulating valve (53) is used to regulate the flow rate or opening status in the coolant circulation path. The coolant pipeline (6) includes a return pipeline (61), a supply pipeline (62), and a spray pipeline (63). The spray effectiveness detection component (7) includes a pump post-pressure sensor (71), a spray flow sensor (72), a liquid level sensor (73), a supply liquid temperature sensor (74), and a return liquid temperature sensor (75). The downstream pressure sensor (71) is located downstream of the electronic circulating pump (4) and is used to detect the downstream pressure formed by the electronic circulating pump (4) at the current speed. The spray flow sensor (72) is used to detect the spray flow rate of the spray pipeline (63); The liquid level sensor (73) is used to detect the liquid level of the insulating coolant (2) in the coolant tank (11); The liquid supply temperature sensor (74) is used to detect the temperature of the insulating coolant (2) before it enters the liquid injection pipeline (63); The return liquid temperature sensor (75) is used to detect the temperature of the insulating coolant (2) after absorbing heat from the server (3); The control component (8) includes a controller (81) and a data storage unit (84). The controller (81) is connected to the electronic circulating pump (4), the fan (52), the regulating valve (53), the pump post-pressure sensor (71), the spray flow sensor (72), the liquid level sensor (73), the supply liquid temperature sensor (74), the return liquid temperature sensor (75), the data storage unit (84), and the remote IoT communication component (9). The data storage unit (84) is used to store the normal correspondence data table, current operating parameters, spray effectiveness status, abnormality type, abnormality handling action and post-processing verification result; The remote IoT communication component (9) is used to upload the normal correspondence data table, current operating parameters, spraying effectiveness status, abnormality type, abnormality handling action, post-processing verification result and alarm information to the remote platform; The controller (81) is used to establish a normal correspondence data table between the speed gear of the electronic circulation pump (4), the actual speed of the electronic circulation pump (4), the pump post pressure and the spray flow rate, and based on the matching relationship between the current speed of the electronic circulation pump (4), the current pump post pressure and the current spray flow rate and the normal correspondence data table, to determine the spray effectiveness and abnormality type, execute the corresponding abnormality handling process and post-processing review.

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